Monitoring and diagnosing device for working machine

• US 8,838,324 B2
• Filed: 01/28/2010
• Issued: 09/16/2014
• Est. Priority Date: 01/28/2010
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Suzuki, Hideaki, Furuno, Yoshinori, Nakamura, Kozo, Yuda, Shinya, Uchiyama, Hiroki
• Primary Examiner(s): Cheung, Calvin
• Assistant Examiner(s): SHUDY, ANGELINA M
• Application Number:
  US13/575,668
• Publication Number:
  US 20120317444A1
• Time in Patent Office: 1,692 Days
• Field of Search: 701/29.1, 701/50, 714/39
• US Class Current: 701/29.1
• CPC Class Codes: B66C 13/16 Applications of indicating, registering, or weighing devices in crane hooks B66C1/40; in safety gear B66C15/00; weighing-apparatus G01G; remote indicating in general G08
• CPC Class Codes: E02F 9/2025 Particular purposes of control systems not otherwise provided for E02F3/16, E02F3/26, sub-groups of E02F3/43, E02F3/651, sub-groups of E02F3/84, E02F3/907, E02F5/145 take precedence
• CPC Class Codes: E02F 9/264 Sensors and their calibration for indicating the position of the work tool
• CPC Class Codes: E02F 9/267 Diagnosing or detecting failure of vehicles
• CPC Class Codes: G05B 23/0278 Qualitative, e.g. if-then rules; Fuzzy logic; Lookup tables; Symptomatic search; FMEA
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Abstract

Monitoring and diagnosing device including: a classification information storage section; frequency information storage section: a first data classifier section reading out reference classification information from the classification information storage section, comparing operational data, detected by a plurality of sensors and inputted in time sequence, with the reference classification information to classify the operational data, and then generating operational data classification information; a frequency comparator section compiling the operational data classification information, generating operational data frequency information by adding, to the operational data classification information, appearance frequency information for each classification of operational data, reading out reference frequency information from the frequency information storage section, and then generating operational data frequency comparison information by comparing operational data frequency information with the reference frequency information; and an abnormality diagnosing section performing an abnormality diagnosis upon the working machine by use of the operational data classification information and operational data frequency comparison information.

Claims

1. A device for monitoring and diagnosing abnormality of a working machine in which the monitoring and diagnosing device receives and inputs in time sequence operational data of the working machine detected by a plurality of sensors and performs abnormality diagnosis on the working machine using the received operational data, the monitoring and diagnosing device comprising:

a processor;

a memory coupled to said processor storing;

a classification information storage section in which reference classification information is stored;

frequency information storage section in which reference frequency information is stored;

a first data classifier section which reads out the reference classification information from the classification information storage section, compares the operational data, which were detected by the plurality of sensors and inputted in time sequence, with the reference classification information to thereby classify the operational data, and then generates operational data classification information;

a frequency comparator section which compiles the operational data classification information, generates operational data frequency information by adding, to the operational data classification information, appearance frequency information for each of the classifications of the operational data, reads out the reference frequency information from the frequency information storage section, and then generates operational data frequency comparison information by comparing the operational data frequency information with the reference frequency information; and

an abnormality diagnosing section which performs dual abnormality diagnosis upon the working machine including a first abnormality diagnosis by use of the operational data classification information and a second abnormality diagnosis by use of the operational data frequency comparison information; and

a display unit which displays at least one of the operational data frequency comparison information generated by the frequency comparator section and diagnostic result data from the abnormality diagnosing section.

2. The device for monitoring and diagnosing abnormality of a working machine according to claim 1, wherein:

the abnormality diagnosing section diagnoses that the operational data is abnormal when, as a result of an abnormality diagnosis upon the working machine using the operational data frequency comparison information, a predetermined difference is detected between the operational data frequency information and the reference frequency information; and

the display unit displays the diagnostic results.

3. The device for monitoring and diagnosing abnormality of a working machine according to claim 2, wherein:

the display unit displays, when the predetermined difference is detected between the operational data frequency information and the reference frequency information, part of the operational data classification information related with the difference.

4. The device for monitoring and diagnosing abnormality of a working machine according to claim 1, wherein:

the first data classifier section extracts only pre-selected reference classification information of all the reference classification information stored in the classification information storage section, and also extracts only operational data associated with the pre-selected reference classification information of all the operational data detected by the plurality of sensors and inputted in time sequence, and then compares the extracted operational data with the extracted reference classification information to generate the operational data classification information.

5. The device for monitoring and diagnosing abnormality of a working machine according to claim 1, the device further comprising:

a classification information generator section which receives and inputs in time sequence operational data of the working machine detected by the plurality of sensors, compares the similarity of the operational data to each other so as to classify the operational data, and generates reference classification information which are stored into the classification information storage section.

6. The device for monitoring and diagnosing abnormality of a working machine according to claim 5, the device further comprising:

a second data classifier section which compares operational data, detected by the plurality of sensors and inputted in time sequence, with the reference classification information generated by the classification information generator section, classifies the operational data by the comparison, and generates operational data classification information; and

a frequency information generator section which compiles the operational data classification information, adds thereto appearance frequency information for each of the classifications of the operational data, and thus generates reference frequency information which are stored into the frequency information storage section.

7. A device for monitoring and diagnosing abnormality of a working machine in which the monitoring and diagnosing device receives and inputs in time sequence operational data of the working machine detected by a plurality of sensors and performs abnormality diagnosis on the working machine using the received operational data, the monitoring and diagnosing device comprising:

a processor;

a memory coupled to said processor storing;

a classification information storage section in which reference classification information is stored;

frequency information storage section in which reference frequency information is stored;

a first data classifier section which reads out the reference classification information from the classification information storage section, compares the operational data, which were detected by the plurality of sensors and inputted in time sequence, with the reference classification information to thereby classify the operational data, and then generates both normalized statistical distance data and nearest-neighbor classification number data, representing operational data classification information;

a frequency comparator section which compiles the nearest-neighbor classification number data of the operational data classification information, generates operational data frequency information by adding, to the nearest-neighbor classification number data of the operational data classification information, appearance frequency information for each of the classifications of the operational data, reads out the reference frequency information from the frequency information storage section, and then generates operational data frequency comparison information by comparing the operational data frequency information with the reference frequency information; and

an abnormality diagnosing section which performs dual abnormality diagnosis upon the working machine including a first abnormality diagnosis by use of the normalized statistical distance data of the operational data classification information and a second abnormality diagnosis by use of the operational data frequency comparison information; and

a display unit which displays at least one of the operational data frequency comparison information generated by the frequency comparator section and diagnostic result data from the abnormality diagnosing section.

8. The device for monitoring and diagnosing abnormality of a working machine according to claim 7, wherein:

the abnormality diagnosing section diagnoses that the operational data is abnormal when, as a result of an abnormality diagnosis upon the working machine using the operational data frequency comparison information, a predetermined difference is detected between the operational data frequency information and the reference frequency information; and

the display unit displays the diagnostic results.

9. The device for monitoring and diagnosing abnormality of a working machine according to claim 8, wherein:

the display unit displays, when the predetermined difference is detected between the operational data frequency information and the reference frequency information, part of the operational data classification information related with the difference.

10. The device for monitoring and diagnosing abnormality of a working machine according to claim 7, wherein:

the first data classifier section extracts only pre-selected reference classification information of all the reference classification information stored in the classification information storage section, and also extracts only operational data associated with the pre-selected reference classification information of all the operational data detected by the plurality of sensors and inputted in time sequence, and then compares the extracted operational data with the extracted reference classification information to generate the operational data classification information.

11. The device for monitoring and diagnosing abnormality of a working machine according to claim 7, the device further comprising:

a classification information generator section which receives and inputs in time sequence operational data of the working machine detected by the plurality of sensors, compares the similarity of the operational data to each other so as to classify the operational data, and generates reference classification information which are stored into the classification information storage section.

12. The device for monitoring and diagnosing abnormality of a working machine according to claim 11, the device further comprising:

a second data classifier section which compares operational data, detected by the plurality of sensors and inputted in time sequence, with the reference classification information generated by the classification information generator section, classifies the operational data by the comparison, and generates operational data classification information; and

a frequency information generator section which compiles the operational data classification information, adds thereto appearance frequency information for each of the classifications of the operational data, and thus generates reference frequency information which are stored into the frequency information storage section.